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Has to be done well. This test is the introduction to physics. It is easy

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Unit 1 Evaluation
Physics 1
(SCIH 035 058)
This evaluation will cover the lessons in this unit. It is open book, meaning you can use your textbook, syllabus, and other course materials. To submit the evaluation, follow the directions provided.
Multiple Choice
Choose the answer that best completes the statement or answers the question.
1. Physics is the most basic science because
a. the foundation of biology is chemistry and the foundation of chemistry is physics.
b. it is about the nature of basic things like forces, energy, and motion.
c. the ideas of physics extend into more complex sciences.
d. you can better understand science in general if you understand physics.
e. all of these are true.
2. Which one of the following problems would not be a part of physics?
a. calculating the average density of a person
b. calculating the amount of energy a person uses while listening to a lecture
c. calculating the instantaneous velocity of an accelerating car
d. identifying all the forces acting on a person who is walking uphill
e. identifying all the bones in a human body
3. Which one of the following steps is not a part of the scientific method?
a. performing experiments to test the predictions
b. repeating the experiments until the answers match the predictions
c. formulating a general rule based on the predictions and experimental outcome
d. making a guess about the answer to a problem and predict its consequences
e. recognizing a problem
Unit 1 Evaluation
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4. A hypothesis is
a. the long side of a right triangle.
b. an educated guess that has yet to be proven by experiment.
c. close agreement by competent observers of observations of the same phenomena.
d. a guess that has been tested over and over again and always found to be true.
e. a synthesis of a large collection of information that includes guesses.
5. Which of the following is a problem that some people blame on technology?
a. improved transportation
b. widespread pollution
c. reduction of acid rain
d. economic growth
6. In the absence of air resistance, objects fall at a constant
a. speed.
b. velocity.
c. acceleration.
d. distances each successive second.
e. all of the above are true.
7. If you drop a feather and a coin at the same time in a tube filled with air, which will
reach the bottom of the tube first?
a. the feather
b. neither—both will reach the bottom at the same time
c. the coin
8. Suppose you take a trip that covers 240 km and takes 6 hours to complete. Your average speed during the trip is
a. 40 km/h.
b. 1440 km/h.
c. 20 km/h.
d. 240 km/h.
e. 480 km/h.
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9. A ball is thrown straight up. At the top of its path, its acceleration is
a. 0 m/s2.
b. about 5 m/s2.
c. about 10 m/s2.
d. about 20 m/s2.
e. about 50 m/s2.
_____ 10. A clothesline is stretched between two trees. A tire hangs in the middle of the line and
the two halves of the line make equal angles with the horizontal. The tension in the line
a. is half the tire’s weight.
b. is less than half the tire’s weight.
c. is more than half the tire’s weight.
_____ 11. Friction is a force that always acts
a. perpendicular to an object’s motion.
b. opposite to an object’s motion.
c. in the same direction as an object’s motion.
_____ 12. If the force of gravity suddenly stopped acting on the planets, they would
a. spiral slowly towards the sun.
b. continue to orbit the sun.
c. move in straight lines tangent to their orbits.
d. spiral slowly away from the sun.
e. fly straight away from the sun.
_____ 13. A bag of sports equipment has a mass of 10.0 kilograms and a weight of
a. 0.98 N.
b. 9.8 N.
c. 98 N.
d. 980 N.
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_____ 14. You and a friend are jumping on a trampoline. Why does Earth, which is rapidly orbiting around the sun, not move under your feet when you jump?
a. There are different rules in space and on the surface of the Earth.
b. Newton’s first law holds that your body moves along with Earth because it is not
compelled to change its motion by an unbalanced force.
c. Newton’s second law holds that the acceleration produced by the force of gravity is
offset by the force of friction on your feet.
d. Newton’s third law holds that there is an equal and opposite force exerted by the
trampoline on your feet, which allows you to move with Earth through space.
_____ 15. Aunt Minnie throws a rock downward, and air resistance is negligible. Compared to a
rock that is dropped, the acceleration of the rock after it is thrown is
a. less.
b. the same.
c. more.
_____ 16. A scalar is a quantity that has
a. direction.
b. magnitude.
c. time.
d. color.
_____ 17. A ball thrown in the air will never go as far as physics ideally would predict because
a. one can never throw the ball fast enough.
b. gravity is acting.
c. air friction slows the ball.
d. ideally the ball would never land.
e. all of the above are true.
_____ 18. A cannon with a barrel velocity of 140 m/s launches a cannonball horizontally from a
tower. Neglecting air resistance, how far vertically will the cannonball have fallen after
1 second?
a. 5 m
b. 150 m
c. 140 m
d. 280 m
e. None of the above is correct.
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_____ 19. A cat is laying on the floor. It is most correct to say that
a. the cat is not moving so no force is acting on the cat.
b. the cat is not accelerating so no force is acting on the cat.
c. the cat is not moving so no net force is acting on the cat.
d. the cat is not accelerating so no net force is acting on the cat.
_____ 20. Lucy stands with one foot on a bathroom scale and her other foot on a second bathroom scale. Each scale reads 300 N. What is Lucy’s weight?
a. 600 N
b. 300 N
c. 600 kg
d. 300 kg
_____ 21. Aristotle is well known for his
a. systematic approach to knowledge and learning.
b. belief that the sun revolved around the Earth.
c. pursuit of the philosopher’s stone.
d. work on inertia.
_____ 22. Galileo disagreed with Aristotle because Galileo
a. believed in a geocentric universe.
b. believed that no force was necessary to keep an object moving.
c. believed that knowledge should be systematically categorized.
d. believed that the natural tendency of an object was to sit still.
_____ 23. One possible unit of speed is
a. miles per hour.
b. light years per century.
c. kilometers per hour.
d. all of the above.
e. none of the above.
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_____ 24. When you look at the speedometer in a moving car, you can see the car’s
a. average distance traveled.
b. instantaneous acceleration.
c. average speed.
d. instantaneous speed.
e. average acceleration.
_____ 25. Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is not true?
a. You and the car are both accelerating.
b. Your acceleration is constantly changing.
c. Your velocity is constant.
d. Your direction is constantly changing.
e. Your speed is constant.
_____ 26. A car starts from rest and after 7 seconds it is moving at 42 m/s. What is the car’s average acceleration?
a. 0.17 m/s2
b. 1.67 m/s2
c. 6 m/s2
d. 7 m/s2
e. None of the above is correct.
_____ 27. Suppose an object is in free fall. Each second the object falls
a. the same distance as in the second before.
b. a larger distance than in the second before.
c. with the same instantaneous speed.
d. with the same average speed.
e. none of the above occurs.
_____ 28. Suppose a jumper claims a hang time of 2 seconds. Then that jumper must be able to
jump a vertical distance of
a. 1 m.
b. 2 m.
c. 3 m.
d. 4 m.
e. 5 m.
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_____ 29. A pencil lies on your desk. If the Earth is moving around the sun at a speed of 30 km/s,
how fast is the pencil moving relative to the desk? How fast is the pencil moving relative to the sun?
a. 0 km/s; 0 km/s
b. 0 km/s; 30 km/s
c. 30 km/s; 30 km/s
d. There is not enough information given to answer these questions.
_____ 30. A ball tossed vertically upward rises, reaches its highest point, and then falls back to its
starting point. During this time the acceleration of the ball is always
a. in the direction of motion.
b. opposite its velocity.
c. directed downward.
d. directed upward.
Choose whether each statement is true or false.
_____ 31. Objects moving at constant speed in a straight-line path are said to be in static equilibrium.
a. True
b. False
_____ 32. A quantity that has both magnitude and direction is called a scalar.
a. True
b. False
_____ 33. The vector sum is called the resultant.
a. True
b. False
_____ 34. Speed tells you how fast an object is moving, while distance tells you how far an object
has moved.
a. True
b. False
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_____ 35. Acceleration is the rate at which velocity changes.
a. True
b. False
Match the following terms with their definitions.
a. fact
b. theory
c. force
d. vector
e. mechanical equilibrium
_____ 36. represents the magnitude and direction of a quantity
_____ 37. a close agreement by competent observers
_____ 38. a state wherein no physical changes occur and the net force on an object is zero
_____ 39. a push or a pull that changes the state of motion on an object
_____ 40. a synthesis of a large body of information that encompasses well-tested and verified
Carefully check your answers on this evaluation and make any corrections you feel are necessary. When you are satisfied that you have answered the questions to the best of your ability, transfer your answers to an answer sheet. Please refer to the information sheet that came
with your course materials.
Unit 1 Evaluation
SCIH 035

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